Latest on Space Weather
Radio emissions from shock waves at the leading edge of the CME suggest that the cloud tore through the sun’s atmosphere at speeds as high as 3750 km/s. That would make this a very fast moving storm, and likely to reach Earth before the weekend. Auroras are definitely in the offing. Stay tuned for a more detailed forecast in the hours ahead.
From Space Weather on earlier CME
“Most of the storm cloud is heading north of the sun-Earth line, but not all. A fraction of the CME will deliver a glancing blow to Earth’s magnetic field during the early hours of Sept. 12th. In the past few weeks, glancing blows from minor CMEs have sparked beautiful auroras around the Arctic Circle. This CME could spark even better displays. NOAA forecasters estimate a 79% (not a typo: 79%) chance of polar geomagnetic storming on Sept. 12th”
Looks like this one is moving faster. It was thought that an earlier CME had weakened the “path” and allowed the Carrington Event CME to travel faster.
Question: any opinions as to effect of both of these arriving about the same time?